This is a theory regarding the plot of The Force Awakens. Feel free to comment. Before the names of the new characters were announced, there was a rumor of Daisy Ridley's character being named Kira. Some observers have juxtaposed Kira with "Rey" to form the name Kira Rey. The name "Kira" has now been confirmed as being Rey's name, as her speeder is officially known as "Kira's Bumper Car." https://www.youtube.com/watch?v=K9oUiu-bw5w That looks an awful lot like the name Kylo Ren. It seems to go along with "Luke" and "Leia" both being names that start with the same letter. The narration at the start of the most recent trailer, meanwhile, certainly is a re-use of the lines from Return of the Jedi, but also appears to hint at the plot of the upcoming film -- that another character aside from Anakin, Luke, and Leia will have the power of The Force. There are those who believe it to be Rey, although it's clear to some degree that Kylo Ren will also have these abilities. I've concluded, thus, that we may have the story of two siblings -- one good, one evil. This seems to borrow from the EU storyline of Jacen and Jaina Solo: Jacen turned evil; his sister Jaina was trained by Boba Fett and she later became a Jedi Master. There were rumors of Boba training Rey in the new film. I turn my attention now to a piece of leaked concept art that has now been confirmed to be official in the trailer. The concept art depicts the damaged Vader helmet that we see in Trailer #2. What's interesting, however, is that we see a figure holding the helmet. This figure is cloaked, wears a sinister mask, and has a cybernetic hand. I've hidden the concept image between spoiler tags here. Spoiler In the most recent trailer, we see a figure in a robe with a cybernetic hand. He is crouched next to R2-D2, and appears when the narrator says "I have it." We assume this to be Luke Skywalker. There are multiple conclusions we can draw. 1. This is Luke Skywalker. For whatever reason, he is wearing a mask. He has turned to the Dark Side, and has trained Kylo Ren. 2. This is Kylo Ren. Ren is inspired by Vader to become evil. That means the figure featured with the cloak and cybernetic hand is Kylo Ren, not Luke. R2-D2 belongs to Ren. Ultimately, the conclusion is that Kylo and Kira are siblings, children of a Skywalker. The essence of Darth Vader has affected Kylo and he has turned to the Dark Side. Luke Skywalker may or may not be evil. Thoughts!